/* GPLv2 License
 *
 * Copyright (C) 2016-2018 Lixing Ding <ding.lixing@gmail.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 **/


#include "heap.h"

void heap_init(heap_t *heap, void *base, int size)
{
    if (heap && base && size) {
        heap->size = size;
        heap->free = 0;
        heap->base = base;
        //memset(base, 0, size);
    }
}

void heap_clean(heap_t *heap)
{
    if (heap) {
        heap->free = 0;
        memset(heap->base, 0, heap->size);
    }
}

void *heap_alloc(heap_t *heap, int size) {
    if (heap) {
        int free;

        size = SIZE_ALIGN(size);
        free = heap->free + size;
        //printf("Alloc %d, size: %u, free: %u\n", size, heap->size, heap->free);
        if (free <= heap->size) {
            void *p = heap->base + heap->free;
            heap->free = free;
            return p;
        }
    }
    return NULL;
}

